Diving suits

Scuba divers are not always able to dive in warm oceans. A type of dive suit known as a dry suit helps divers dive in very cold water, such as winter seas. Wearing a dry suit prevents cold water from getting inside to allow divers to dive comfortably by wear warm clothing underneath their suit. Zippers are extremely helpful in putting on and taking off these suits, and YKK provides zippers that do not let water in.

Zipper of a diving suit -
Perfect for cold water diving
Watertight/airtight zipper